中国生态农业学报2017，Vol.25Issue(10)：1423-1432,10.DOI:10.13930/j.cnki.cjea.170111
古尔班通古特沙漠人工梭梭林群落生态特征研究
Ecological characteristics of cultivated Haloxylon ammodendron communities in Gurbantunggut Desert
摘要
Abstract
The ecological characteristics of Haloxylon ammodendron communities cultivated under rainfed conditions for 33 years in Mosuowan of Southern Gurbantunggut Desert were analyzed under two afforestation techniques― snow-sand dress-ing afforestation and autumn-irrigated afforestation. The growth potential, understory vegetation and soil water content were monitored and recorded. Results showed that: 1)H. ammodendronhad strong growth with an average plant height and canopy spread under both cultivation techniques exceeding 2 m and 2 m2, respectively. The average length of new branches was more than 20 cm, with a survival rate of afforestation of 40% under snow-sand dressing and 63% under autumn irrigation. The den-sity was enhanced and uneven-aged mixed forest was formed due to natural regeneration. There were different kinds of domi-nant species herbs in the forest. The average soil water content under the two forest treatments both exceeded 2.00%, which was enough to support H. ammodendrongrowth. 2) There were obvious differences between the two forests cultivation tech-niques in terms of vegetation cover and species diversity and natural regeneration of H. ammodendrondue to the differences in the treatments, site conditions and initial water supply. 3) The two communities were highly adaptable to the local ecological conditions. Compared with autumn irrigated afforestation, the density, vegetation cover and number of natural regeneration were lower in snow-sand dressing afforestation. The cost also was lower, but grew slowly under autumn irrigated afforestation after irrigated was stopped. There was the need for effective artificial measures to reduce the density of H. ammodendron. In conclusion,H. ammodendrongrowth under snow-sand dressing and autumn irrigated afforestation was both stable with the latter well-adapted to the local ecological conditions.关键词
积雪-客沙造林/秋灌造林/梭梭林/自然更新/物种多样性/土壤水分/古尔班通古特沙漠Key words
Snow-sand dressing afforestation/Autumn-irrigated afforestation/Haloxylon ammodendron forest/Natural regen-eration/Species diversity/Soil water content/Gurbantunggut Desert分类
农业科技引用本文复制引用
丁改改,蒋进,宋春武,李生宇,王海峰,周杰,李亚萍..古尔班通古特沙漠人工梭梭林群落生态特征研究[J].中国生态农业学报,2017,25(10):1423-1432,10.基金项目
国家科技部对发展中国家科技援助项目(KY201502003)资助 The study was supported by the Scientific & Technology Program of Developing Countries Assisted by the Ministry of Scientific and Tech-nology of the People's Republic of China (KY201502003). （KY201502003）
